.radio{
  display: block;
  width: evw(24);
  height: evw(24);
  border:evw(2) solid #FFFFFF;
  border-radius: 50%;
  position: relative;
}
.radio-on{

  &:after{
    content: '';
    display: block;
    position: absolute;
    left: 0;top: 0;right: 0;bottom: 0;
    margin: auto;
    width: evw(16);
    height: evw(16);
    background:#fff;
    border-radius: 50%;
  }
}